| Originally posted by bluee36e36@Mar 15 2005, 01:25 AM |
i had a high flow catalytic converter on my 325is today and it makes a pinging sound from about 2000rpm up to about 3500 when the vanos kicks inn.
why does it do this? is it because i took off the resonators and will it go away if i use glasspacks as mufflers because they act as resonators?
What year is your 325? My 95 has two cats. Did you replace two with one? Did you replace the whole center section? Pinging is usually a sign of leaness and detonation, not a good thing.
1995 325I, window tint, K&N, debaffled airbox, BMW #104 wheels, Nighthawk low beams, smoked side markers, smoked corners, smoked taillights, M3 stlye heated mirrors, various interior bits, Bosal cat-back.